An entity that is identified as the subject of a certificate at the end of a certification path or shares a symmetric key with other entities for communication.
Source(s):
NIST SP 800-57 Part 2 Rev.1
under End entity
A certificate subject which uses its private key for purposes other than signing certificates.
Source(s):
NIST SP 800-15
[Withdrawn]
Relying Parties and Subscribers.
Source(s):
NIST SP 800-32
[Withdrawn]
under End Entity